4.17 – Secondary Storage Summary


Previous: 4.16 - Optical Storage

Now that we have looked at all three types of secondary storage, it's time to compare them.

Table 1 shows the comparison of Magnetic Storage, Flash Storage, and Optical Storage.

Table 1

  Magnetic Storage Flash Storage Optical Storage
Read/Write Speed Middle (~3Gb/s) Best (~6Gb/s) Worst (~50Mb/s)
Cost Middle (<5p/GB) Worst (~10p/GB) Best (<5p/GB)
Capacity Best (~16TB) Middle (~8TB) Worst (~25GB)
Durability Middle Best Worst
Portability Worst Middle Best



What are some other factors for SSDs that weren't mentioned in the table?

Tap/click to reveal SSDs have a lower power consumption and run cooler than HDDs. However, they deteriorate over time.





Next: 4.18 - Cloud Storage



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